In Part 3 of The Invisible Photograph, see how the “techno archaeologists” of the Lunar Orbiter Image Recovery Project digitally recovered the first photographs of the moon taken by a set of unmanned space probes in the 1960s. More information and Gigapan imagery.

Would-Be Rescuers of Wayward Spacecraft Previously Solved a NASA Mystery, New York Times“Before reviving a zombie spacecraft, Dennis Wingo and Keith Cowing traveled to the past to rescue a trove of early moon photographs that otherwise would have been destined for oblivion. They did not actually time travel, but that might have been easier. Mr. Wingo, an entrepreneur and an engineer, and Mr. Cowing, the editor in chief of the NASA Watch website, had confidence that they could decipher decades-obsolete NASA equipment, because, as Mr. Cowing said, “we’ve done this before.” … The earlier project involved 1,500 magnetic tapes and a couple of old, broken tape drives. In 1966 and 1967, NASA sent five robotic spacecraft, the Lunar Orbiters, to photograph the moon’s surface to help find safe landing sites for the Apollo astronauts. The tapes, which recorded the original high-resolution images, and the tape drives ended up in the garage of a former NASA employee, and Mr. Wingo and Mr. Cowing embarked on a quixotic mission to retrieve the images.”